1) cationic ring opening polymerization
阳离子开环聚合反应
2) Cationic ring-opening polymerization
阳离子开环聚合
1.
Polytetrahydrofuran(PTHF) with narrow molecular mass distribution was prepared by cationic ring-opening polymerization of tetrahydrofuran using H_2SO_4·SO_3-HClO_4 system as a catalyst.
以发烟硫酸-高氯酸为催化剂,通过四氢呋喃的阳离子开环聚合合成了窄分子量分布的聚四氢呋喃(PTHF)。
2.
Two polyoxetanes,poly 3-(2-cyano ethoxy)methyl-3′-methyloxetane(POA) and poly 3-(methoxy(triethylenoxy))methyl-3'-methyloxetane(POE) were synthesized by the cationic ring-opening polymerization(CROP).
认为活性链端机理和活性单体机理两种机理的相互竞争、相互转换可解释氧杂环丁烷阳离子开环聚合反应中无法通过单体与引发剂的摩尔浓度比来调节聚合物分子量,分子量分布宽,并伴有大量齐聚物生成的现象。
3.
3-Nitratomethyl-3-ethyloxetane was synthesized by the process of cyclization,nitation from trimethlolpropane and diethyl carbonate, and the homopolymer of 3-nitratomethyl-3-ethyloxetane was synthesized with 1,4-butanediol as initator and boron trifluoride etherate as an catalyst by cationic ring-opening polymerization.
Et2O)为催化剂,NIMEO发生阳离子开环聚合得到一种端羟硝酸酯均聚醚PNIMEO。
3) cationic polymerization
阳离子聚合反应
4) N-acyliminium cyclization
阳离子环合反应
1.
Theoretical investigation on the dehydroxylation and N-acyliminium cyclization mechanisms of 6-hydroxy-l-(phenanthren)-piperidin-2-ketone;
6-羟基-1-(菲基)-哌啶-2-酮脱羟基及其阳离子环合反应机理的理论研究
5) cationic ring-opening copolymerization
阳离子开环共聚合
6) cationic copolymerization
阳离子共聚反应
1.
The cationic copolymerization of α-pinene and styrene initiated by AlCl_3 alone and AlCl_3/SbCl_3 compound catalyst respectively was investigated.
比较了AlCl_3和AlCl_3/SbCl_3复合体系的α-蒎烯/苯乙烯阳离子共聚反应及产物的摩尔质量分布。
补充资料:阳离子-阳离子干扰
分子式:
CAS号:
性质:火焰原子吸收光谱分析中,伴生阳离子对待测阳离子测定中信号的增强或抑制。它属于化学干扰;信号增强属于增感效应,信号被抑制属于干扰效应。如测定镁时铝存在可抑制镁的信号;测定铝时钛存在,可增强铝的信号。前者由于生成难解离的MgO·Al2O3,减少了镁的基态原子;后者是钛的亲氧能力比铝强,钛夺取了氧化铝中的氧,生成氧化钛,铝从氧化铝中释放出来。
CAS号:
性质:火焰原子吸收光谱分析中,伴生阳离子对待测阳离子测定中信号的增强或抑制。它属于化学干扰;信号增强属于增感效应,信号被抑制属于干扰效应。如测定镁时铝存在可抑制镁的信号;测定铝时钛存在,可增强铝的信号。前者由于生成难解离的MgO·Al2O3,减少了镁的基态原子;后者是钛的亲氧能力比铝强,钛夺取了氧化铝中的氧,生成氧化钛,铝从氧化铝中释放出来。
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